Calcxtlatino device



April 29 19.24.v

/ /F. FULGOR CALCUL-ATINQ DEVTCE Filed Feb'. 15

the claim.

character designa-ted which measure or weight.

- and 6 are so mounted Patented Apr. 29, 19,24.

Arami rumena, or rrrrsnuaen, rnNNsYLvaNu.

,cALcULArING nevica Application lied February To all whom t mycowem:

Be' it known that I, Faun FULGORA, a' citizen-of the United States, and a resident ofv Pittsburgh, in the county of Allegheny and State ofPennsylvania, 'have invented certain new and useful Improvements in Calculatin Devices; and I do hereby de; clare the ollowing' to be a full, clear, and exact description will enable others skilled in the art to which it ap rtains tomake and use the same.'

- This invention relates to improvements in rtable calculating devices and more particularl vto such as may be made of thin material, such as cardboard for example and at. suchv cost as to permit their use or advertising purposes-one object of the invention being to provide a device of the may `be conveniently operated'to accurately calculate the total cost ofa given quantity of material at I one or'another price per unit of measure.

With this andother objects in view, the invention consists incertain novel features of construction and combinations of parts as' hereinafter .set forth and pointed out in In the accompanying drawings, Figure 1 is a view of a calculator embodying my improvements. Figure 2 is 'a sectional view of theL same, and Fi res 3 and 4 are views of the calculating dlsks..

Forconvenience of description and illustration, I have shown and will describe my improvements as a calculator for determin in the total cost of any desired number of ga lons of gasoline, at any one of various selling prices of this product, per gallon, but it will be understood that myimprovements are applicable for calculating the cost of a plurality of units of other materials. having a particular unit value, whether the units bev reckoned by either liquid or dry calculator comprises a frame consisting of two elongated members 1 and 2 disposed parallelwith each' other and having curved upper and lower edges as` indicated at 3 and 4, and two circular disks 5l vand 6 disposed between the members 1 and 2 and pivotally connected with the same, as indicated at 7 and 8.- The disks 5 between the members 1 and 2 that the disk 5 will overlap the disk 6 and said disks have such size that they will project slightly beyond the curved end My improved `of the invention,`such asgy 1s, 1m. sensi No. 531,036;

portions 3 and'4vof the members 1 and 2 l to be readily engagedby the linger of the user for turning them.

The disk 6 is provided with an annular series of radial columns 9 having indicatedvtherein the total cost of given quantities of material, which quantities are indica-ted on said disk .by numerals representin quantities, said numerals being errang 1n circular formation between the center of the disk and the inner ends of. the columns as in dioated at 10 and each in radial alignment with one of the radial columns 9.

, The disk 5 is provided with a plurality of slots 11 which are arranged in spiral vrelation sov that lany one of said slots may over# lie any one of the radial columns 6 and each slot willpermit a reading of a single number in the column. Near the center of the disk 5 is an arcuate series of numbers, each number being alined radially with one of the slots 11, as indicated at 12 and these y numbers represent prices of units of weight or measure of material. One end of this partially circular series of price numbers is 1n radial alignment with one end of the spiral series of slots and the other end of said partially circular series of price numbers is in radial alignment with the other end of the spiral series of slots.

' The front member 1 of the frame is provided on its medial longitudinal line with ,a slot or opening 13 through which the quantity designations 1() on the disk 6 may be seen (one at ajtime) and adjacent this slot or opening upon the face of the frame member 1 may appear a suitable designating legend, as Gallons, forexample. Below the slot or opening 13, thefront member 1 is provided with an elongated medial longitudinal slot 14 and the disk 5. is so arranged that it will pass behind the slot 14: and cause one or another of the slots 11 to expose' a number iIro-ne of the radial columns of total cost of a certain number of gallons at a certainprice,-theprice per gallon indicated in the arcuate series of numbers l12 on the disk 5 being seen through an opening 15. in the frontrmember 1. .The slot 14 may be`designated Total amount and the opening 15 being designated ,Price.

It will be noted that the slots 13, 14 and .15 are alined longitudinally of the vframe plate' at the center thereof with the smallr openings 13 and 15 at thel opposite ends 'of the disk 6 and thus indicate the disks.

My improved calculator can bemannfactured at small cost and its front and back members l and 2 are admirably adapted to receive advertisin matter. y

Having fully descri ed my invention what I claim as new and desire to secure by Letters Patent, is:

A calculator comprising a front frame member and a pair -of disks pivotally mounted upon the back of said frame member with a portion of one disk overlapping a like portion of the other disk at the center of the frame member, the said frame member being provided at its center with a longitudinally extending slot and with openings adjacent and equally spaced from the opposite ends of the slot, the disks having upon their faces in corresponding positions arcuate series of price and quantity designations respectively, said designations bescribing Witnesses.

ing viewable single through the respective smaller bpenings in the frame member, the

overlapped disk having upon its face radial columns of total cost designations alined with the respective quantity designations on said disk and adapted t0 registerwithvthe longitudinal slot in the frame member and the overlapping disk being provided with a series of openings alined radially with the respective price designations on said disk and disposed at progressively greater radial distances from said designations whereby they may register singly with the longitudinal slot in the frame member and expose through said slot a total cost designation constituting the product of the price and quantity designations exposed through the smaller openings at the ends of the slot. In testimony whereof, I have signed this specification inthe presence of two sub- FRED FULGoRA. Witnesses W. D. DUDLEY, GEORGE ABERNATHY; 

